Beyond Ti3C2Tx: MXenes for Electromagnetic Interference Shielding

Han, Meikang; Shuck, Christopher E.; Rakhmanov, Roman; Parchment, David; Anasori, Babak; Koo, Chong Min; Friedman, Gary D.; Gogotsi, Yury

doi:10.1021/acsnano.0c01312

Cited by 588 publications

(433 citation statements)

References 39 publications

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“…Han et al reported that the spray coated Ti 3 C 2 T x -MXene layer with 40 nm exhibits 21 dB of EMI SE and most of the MXene with thickness below 10 micron and above skin depth shows EMI SE above 20 dB. Further he added that the Ti 3 C 2 T x MXene displayed good EMI shielding efficiency among other MXenes [ 28 ]. Chen et al explained that the introduction of the silver nanowire considerably improves EMI SE and added that the neat silver nanowire gives rise 21 dB while MXene-welded silver nanowire film exhibits 34 dB with excellent mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

EMI Shielding of the Hydrophobic, Flexible, Lightweight Carbonless Nano-Plate Composites

et al. 2020

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The cost-effective spray coated composite was successfully synthesis and characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and X-ray diffraction techniques. The one step synthetic strategy was used for the synthesis of nanoplates that have a crystalline nature. The composites are amorphous and hydrophobic with micron thickness (<400 m). The maximum contact angle showed by composite is 132.65° and have wetting energy of −49.32 mN m−1, spreading coefficient −122.12 mN m−1, and work of adhesion 23.48 mN m−1. The minimum thickness of synthesized nanoplate is 3 nm while the maximum sheet resistance, resistivity, and electrical conductivity of the composites are 11.890 ohm sq−1, 0.4399 Ω.cm−1, and 8.967 S.cm−1, respectively. The cobalt nanoplate coated non-woven carbon fabric (CoFC) possesses excellent sheet resistance, hydrophobic nature, and EMI shielding efficiency of 99.99964%. The composite can block above 99.9913% of incident radiation (X band). Hence, the composite can be utilized in application areas such as medical clothes, mobile phones, automobiles, aerospace, and military equipment.

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Section: Resultsmentioning

confidence: 99%

EMI Shielding of the Hydrophobic, Flexible, Lightweight Carbonless Nano-Plate Composites

et al. 2020

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“…Note that the limited applications of Nb-containing MXenes suggest they might face similar challenges as other hybrid MXene systems. Nb-containing MXenes do show improvement in EMI shielding applications compared to their pure counterparts [62]. For example, Nb y V 2−y CT x (15-36 dB depending on the content of V) performs better than Nb 2 CT x (10-15 dB) in the frequency of 8.2-12.4 GHz in EMI shielding.…”

Section: Applicationmentioning

confidence: 99%

“…For the Mo-containing MXenes, most of the papers focus on synthetic methods with limited applications [60][61][62]. Certainly, hybrid transition metals of Mo-containing MXenes are expected to enable new functions than single transition metal MXenes [60].…”

Section: Applicationsmentioning

confidence: 99%

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Synthesis and recent applications of MXenes with Mo, V or Nb transition metals: a review

Zhao

2020

Tungsten

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Discovered in 2011, MXene becomes a most recent and active member of two-dimensional materials. Since then, the landscape of MXene grows significantly and now more than 30 different MXenes were obtained experimentally. Though most of the efforts are contributed to Ti-MXenes which have the highest level of maturity of the synthetic technology and productivity, in recent years, new-MXene systems with Molybdenum (Mo), Vanadium (V), and Niobium (Nb) as the transition metals demonstrated their unique properties and applications. The development of new-MXenes not only expands the synthetic methods and applications of MXenes but also faces new challenges. Therefore, a timely summary of Mo-, V-and Nb-MXenes will be extremely beneficial. Here, the synthetic methods of the selected new-MXenes are summarized and their most recent applications are highlighted to provide an outlook for the future development of MXenes.

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“…More than 30 stoichiometric MXene structures have been synthesized from the more than 100 predicted compositions, and there have also been reports on the creation of solid solution MXenes. [2][3] MXenes have been utilized in various fields, including energy storage and conversion, electromagnetic interference shielding, nanocomposites, sensors, and biomedical applications. [4][5] As the scope of MXene research has expanded, so too have studies on improving the quality of MXenes by exploring new synthesis routes and processing methods in order to enhance their performance.…”

Section: Introductionmentioning

confidence: 99%

Modified MAX Phase Synthesis for Environmentally Stable and Highly Conductive Ti3C2 MXene

Mathis

Maleski²,

Goad³

et al. 2020

Preprint

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One of the primary factors limiting further research and the commercial use of the two-dimensional (2D) MXene titanium carbide (Ti3C2), as well as MXenes in general, is the rate at which freshly made samples oxidize and degrade when stored as aqueous suspensions. Here, we show that including excess aluminum during synthesis of the Ti3AlC2 MAX phase precursor leads to the creation of Ti3AlC2 grains with improved stoichiometry and crystallinity. Ti3C2 nanosheets produced from the improved Ti3AlC2 are of higher quality, as evidenced by their increased resistance to oxidation and an increase in their electrical conductivity to 20,000 S/cm. Our results indicate that defects created during the synthesis of Ti3C2 (and by inference, other MXenes) lead to the previously observed instability. We show that by eliminating those defects results in Ti3C2 that is highly stable in aqueous solutions and in air. Aqueous suspensions of single- to few-layer Ti3C2 flakes produced from the modified Ti3AlC2 have a shelf life of over ten months, compared to one to two weeks for Ti3C2 produced from conventional Ti3AlC2, even when stored in ambient conditions. Freestanding films made from Ti3C2 suspensions stored for ten months show minimal decreases in electrical conductivity and negligible oxidation. Oxidation of the improved Ti3C2 in air initiates at temperatures that are 100-150°C higher than conventional Ti3C2. The observed improvements in both the shelf life and properties of Ti3C2 will facilitate the widespread use of this material.

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Beyond Ti₃C₂T_x: MXenes for Electromagnetic Interference Shielding

Cited by 588 publications

References 39 publications

EMI Shielding of the Hydrophobic, Flexible, Lightweight Carbonless Nano-Plate Composites

EMI Shielding of the Hydrophobic, Flexible, Lightweight Carbonless Nano-Plate Composites

Synthesis and recent applications of MXenes with Mo, V or Nb transition metals: a review

Modified MAX Phase Synthesis for Environmentally Stable and Highly Conductive Ti3C2 MXene

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